CN109153233B - Laminated glazing with a functional layer having a removed edge portion - Google Patents
Laminated glazing with a functional layer having a removed edge portion Download PDFInfo
- Publication number
- CN109153233B CN109153233B CN201780033702.1A CN201780033702A CN109153233B CN 109153233 B CN109153233 B CN 109153233B CN 201780033702 A CN201780033702 A CN 201780033702A CN 109153233 B CN109153233 B CN 109153233B
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- China
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- glass sheet
- glass
- laminated glazing
- functional layer
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- 239000002346 layers by function Substances 0.000 title claims abstract description 43
- 239000011521 glass Substances 0.000 claims abstract description 99
- 210000003298 dental enamel Anatomy 0.000 claims abstract description 29
- 230000002093 peripheral effect Effects 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 239000011229 interlayer Substances 0.000 claims abstract description 9
- 239000012790 adhesive layer Substances 0.000 claims abstract description 8
- 238000000151 deposition Methods 0.000 claims description 28
- 239000010410 layer Substances 0.000 claims description 23
- 238000005452 bending Methods 0.000 claims description 13
- 230000008021 deposition Effects 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000007650 screen-printing Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 5
- 230000000873 masking effect Effects 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- 239000005329 float glass Substances 0.000 description 6
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 6
- 229910052709 silver Inorganic materials 0.000 description 6
- 239000004332 silver Substances 0.000 description 6
- 238000004544 sputter deposition Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 238000010257 thawing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000005341 toughened glass Substances 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 206010042496 Sunburn Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000005345 chemically strengthened glass Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000000475 sunscreen effect Effects 0.000 description 1
- 239000000516 sunscreening agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10165—Functional features of the laminated safety glass or glazing
- B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
- B32B17/10183—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer being not continuous, e.g. in edge regions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1207—Heat-activated adhesive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
- B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
- B32B17/10128—Treatment of at least one glass sheet
- B32B17/10137—Chemical strengthening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10165—Functional features of the laminated safety glass or glazing
- B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10165—Functional features of the laminated safety glass or glazing
- B32B17/10339—Specific parts of the laminated safety glass or glazing being colored or tinted
- B32B17/10348—Specific parts of the laminated safety glass or glazing being colored or tinted comprising an obscuration band
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
- B32B17/10761—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1207—Heat-activated adhesive
- B32B2037/1215—Hot-melt adhesive
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Joining Of Glass To Other Materials (AREA)
- Laminated Bodies (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
The present invention relates to: -a laminated glazing comprising a first glass sheet and a second glass sheet, said first and second glass sheets being bonded to each other by an interlayer adhesive layer, characterized in that the face of the first glass sheet facing the second glass sheet comprises a peripheral opaque enamel band and a functional layer deprived of borders, the edge of the functional layer covering the peripheral enamel band while being located completely within the surface of the band, and the thickness of the second glass sheet being strictly less than 1.4 mm; two methods for manufacturing such laminated glazing; and the use of such a laminated glazing for transportation vehicles, buildings, interior furnishings or street furniture, in particular as a motor vehicle windscreen.
Description
The invention relates to laminated glazings for all applications, in particular for transport vehicles, in particular for motor vehicle windscreens, or for the building industry, and which comprise functional layers, such as heatable (anti-icing, anti-fogging) and/or sunscreen functional layers, that is to say layers intended to reflect a greater or lesser portion of the solar radiation, in order to limit the heating of the passenger compartment or room of the building of the transport vehicle.
In the following, the term "layer" generally denotes a stack of thin layers of a thickness as small as a few nanometers, in particular formed by a vacuum process, in particular by magnetron-assisted cathodic sputtering. The heatable functional layer is electrically conductive and is connected to a current source via a busbar formed in contact with the layer. In the context of the present invention, the functional layer preferably represents, for example, Clima coat stacks sold by Saint-Gobain Sekurit which are heatable, anti-ice/anti-fog and sun-resistant. This type of stack allows savings of 0.1 litres/100 km by reducing the need to use air conditioning. It may be a stack with three silver layers, as described in application WO2010/037968, with two or four silver layers, or any other heatable functional layer/stack, such as ITO (tin-doped indium oxide), as well as non-heatable functional layers/stacks.
In general, the faces of the glass sheets of the laminated glazing are numbered starting from 1 from the face in contact with the outside atmosphere, then 2 for the face of the same glass sheet facing the inside of the cabin or building of the transport vehicle, then, from the outside inwards, 3 and 4 in succession for the two faces of the second glass sheet, and so on, all the glass sheets being bonded in pairs by polyvinyl butyral (PVB), Ethylene Vinyl Acetate (EVA) or equivalent types of interlayer adhesive in the presence of more than two glass sheets.
According to a first method, it is possible to envisage depositing a functional layer on face 3 (the external face of the second glass sheet). In the case of a functional layer de-rimmed portion (demarge), i.e. removed on a peripheral portion of the glazing surface (for example with a metal brush), it may be necessary, for aesthetic reasons, to hide the edge of the functional layer of the de-rimmed portion seen from the outside, for example by depositing an opaque enamel, for example a black enamel peripheral strip, on the periphery of the face 2 of the laminated glazing (the internal face of the first (external) glass sheet).
However, it may be advantageous to deposit the functional layer on face 2 of the laminated glazing compared to the deposition on face 3: obviously, when it is a defrosting layer, it is advantageous to have the heating layer closer to the frost. It is therefore an object of the present invention to produce a laminated glazing having at least retained aesthetic qualities and improved functionality.
To this end, the object of the invention is a laminated glazing comprising a first glass sheet and a second glass sheet bonded to each other by an interlayer adhesive layer, characterized in that the face of the first glass sheet facing the second glass sheet comprises a peripheral strip of opaque enamel and a functional layer of a de-rimmed portion, the edge of the functional layer covering the peripheral enamel strip, lying completely inside the surface of the peripheral enamel strip, and in that the thickness of the second glass sheet is strictly less than 1.4 mm. Thus, assuming that the face 2 of the laminated glazing is provided with enamel and a functional layer, the peripheral strip of opaque enamel hides the edge of the functional layer from the edge portion seen from the outside. Moreover, the defrosting effect is improved compared to the defrosting layer on the face 3 of the glazing (and therefore further away from the frost to be removed); in contrast to the defrost layer on face 3, there is no shielding effect of the interlayer adhesive layer.
Preferably, the first glass sheet has a thickness at least equal to 1.4mm and is not stiffened. This relatively high thickness makes it easier to handle and process the sheet on an industrial scale. Devices for depositing layers, deformations, etc. of glass sheets on an industrial line are suitable for these thicknesses. To the extent that the functional layer deposited on the first glass sheet perfectly resists bending of the sheet and is not damaged at all, it is particularly advantageous to be able to deposit it on a flat substrate. This is because it is known that, for example, the deposition of a stack of three silver (Ag) layers on a curved substrate results in an extremely difficult control of the optical properties of the stack, thus resulting in very low deposition efficiency.
In an advantageous embodiment, the second glass sheet has a thickness at most equal to 1.1 mm. This arrangement makes it possible to reduce the weight of the final laminated glazing. Furthermore, in display devices on the interior face of the laminated glazing, such as head-up display (HUD) devices on automobile windshields, the thinness of the interior glass sheet causes almost overlap of the reflected images on faces 4 and 2 of the laminated glazing, in other words, almost disappearance of the ghost image (ghost image) or double image.
The deposition of the functional layer on the first glass (that is to say on the outer glass) is particularly advantageous when the second glass sheet is a thin glass having a thickness at most equal to 1.1 mm. This is because a conventional industrial production line for depositing stacks of thin layers (e.g. Clima coat @) by magnetron assisted cathodic sputtering is suitable for the production of PLF (full width float glass) size glass having a thickness greater than or equal to 1.4mm, which would require considerable modifications to the line, in particular for all stages of processing the glass (unstacking/stacking, conveying, cutting), to be deposited on glass having a thickness less than or equal to 1.1 mm. In the opposite case, it was found that the productivity was greatly reduced (glass breakage, deposition efficiency lower than usual), which was economically disadvantageous.
In applications of the present type, the thin glass sheets are preferably mechanically strengthened, very particularly chemically stiffened. However, the deposition of a layer on chemically tempered glass can only be performed after chemical tempering. In fact, it is not possible to deposit a layer or stack before chemical rigidization is carried out, since chemical rigidization can damage many functional layers/stacks, such as those mentioned above, in a non-uniform manner. Stiffening will then be asymmetric because of the presence of a barrier to alkali metals in the functional stack and the asymmetric exchange of ions between the two faces of the glass will result in asymmetric mechanical stresses and ultimately in waviness, forming undulations on the glass. Therefore, it is necessary to form a functional layer on a chemically stiffened substrate. Furthermore, chemical tempering must be performed after the bending of the substrate, since the bending of the chemically tempered glass sheet causes a loss of chemical tempering (re-homogenization of the ions by thermal diffusion) and therefore reduces the mechanical strength of the thin glass. Therefore, the deposition of functional layers on thin chemically strengthened glass sheets will be performed on curved substrates, which is highly disadvantageous as explained above. Thus, the use of a thin glass sheet in a laminated glazing may facilitate the deposition of a functional layer on another relatively thick flat glass sheet of the laminated glazing (prior to its bending).
The subject of the invention is also a method for manufacturing a laminated glazing as described above.
The first method includes the operations of:
-depositing, by screen printing or equivalent, one or more opaque enamel strips on a first glass sheet having dimensions at least equal to those of the blank and at most equal to those of the PLF (6m x 3.21m), according to a geometric shape which defines at least part of the perimeter of said one or more laminated glazings;
-pre-curing the first glass sheet at a temperature of 500 to 600 ℃ to completely remove the organic binder and pre-cure the opaque enamel;
-depositing a functional layer on a first glass sheet, in particular by reduced-pressure cathode sputtering assisted in a magnetic field;
-cutting, if necessary, the first glass sheet into blanks (primatives) at the latest at this moment;
-introducing blanks of first and second glass sheets into a production line for assembling the laminated glazing;
-cutting blanks of first and second glass sheets into their final shape and feeding them into a washing machine;
-if necessary (i.e. if masking at the time of deposition of the layer is not performed where it is desired to avoid the presence of the layer), causing the edge portions to be removed from the functional layer;
-forming busbars on the latter by screen printing or equivalent means, then drying;
-pairing a first glass sheet and a second glass sheet and bending them by heating;
-assembling the laminated glazing by an interlayer adhesive layer.
Opaque enamels are generally black and of known composition; instead of an opaque enamel, a silicate paint, for example a black paint, may be used.
The pre-cure at 500-.
The first operation of the method, up to the deposition of the functional layers involved, is carried out indifferently on a blank of the first glass sheet, or conveniently on a glass of larger dimensions from which a plurality of blanks can be cut. Such larger dimensions may be a full width float glass (PLF) (3.21m x 6m) or smaller surface, one side of which is 3.21m (e.g. 3.21m x 2m), from which e.g. a number of 1.50m x 1m blanks may be cut. Cutting out the blank of the first glass sheet may be a first step or may be performed at any time before introduction into the production line for assembling the laminated glazing.
The edge of the functional layer is removed with a metal brush or equivalent.
The bus bars may be made of silver in a known manner.
According to the invention, the functional layer is completely resistant to thermal bending. The opaque enamel band hides the peripheral edge of the functional layer of the debrimmed portion, as well as the busbars, from the external view.
The second method includes the operations of:
-depositing, by screen printing or equivalent, one or more opaque enamel strips on a first glass sheet having dimensions at least equal to those of the blank and at most equal to those of the PLF (6m x 3.21m), according to a geometric shape which defines at least a portion of the periphery of the laminated glazing or glazing, and then drying;
-forming busbars on a first glass sheet by screen printing or equivalent means, then drying;
-pre-curing the first glass sheet at a temperature of 500 to 600 ℃ to completely remove the organic binder and pre-cure the opaque enamel and the busbars;
-cutting the first glass sheet into blanks, if necessary, at the latest at this moment;
-introducing blanks of first and second glass sheets into a production line for assembling the laminated glazing;
-cutting blanks of first and second glass sheets into their final shape and feeding them into a washing machine;
-depositing a functional layer on the first glass sheet over the busbars, in particular by magnetic field-assisted reduced-pressure cathode sputtering;
-if necessary (i.e. if masking at the time of deposition of the layer is not performed where it is desired to avoid the presence of the layer), causing the edge portions to be removed from the functional layer;
-pairing a first glass sheet and a second glass sheet and bending them by heating;
-assembling the laminated glazing by an interlayer adhesive layer.
According to two particular embodiments of the process of the invention:
-chemically rigidising the second glass sheet between the heated bending of the two glass sheets and their assembly into a laminated glazing;
-just before pairing the first and second glass sheets and bending them under heating, depositing a second opaque enamel strip on the busbar or functional layer according to a geometry defining at least a portion of the periphery of the laminated glazing, drying it and pre-curing it at a temperature of 500 to 600 ℃; the function of the second opaque enamel band is to hide the peripheral edge of the bus bar and the functional layer of the chamfered portion from view from the passenger compartment of the vehicle, the interior of the building, etc., which is not always necessary (depending on the structure of the bodywork opening or of the laminated glazing frame).
Other objects of the invention include the use of the above laminated glazing for ground, air or water transportation vehicles, buildings, furnishings or street furniture, in particular as a motor vehicle windscreen.
A laminated motor vehicle windshield is manufactured in accordance with the foregoing teachings.
It consists of a non-rigidized soda-lime-silica float glass sheet with a thickness of 2.1mm and a chemically rigidized soda-lime-silica float glass sheet with a thickness of 1mm, said sheets being bonded to each other by a polyvinyl butyral sheet with a thickness of 0.76mm (PVB).
A glass sheet with a thickness of 2.1mm is intended to be in contact with the outside atmosphere, and a glass sheet with a thickness of 1mm is intended to be in contact with the passenger cabin of the vehicle.
On a glass sheet made of full width float glass with a thickness of 2.1 mm:
-depositing a peripheral band of black enamel by screen printing;
-pre-curing the glass sheet at a temperature of about 550 ℃ for 1 to 5 minutes to completely remove the organic binder and pre-cure the black enamel;
-depositing stacks of clima coat @, marketed by Saint-Gobain Sekurit company, which are heatable, anti-icing/anti-fogging and provide protection against sunlight, on a glass sheet by reduced pressure cathode sputtering under the assistance of a magnetic field; it is a stack comprising three silver layers, as described in application WO 2010/037968.
Glass sheets made of full width float glass (PLF) are subsequently cut into blanks starting from glass.
The blank and a blank of a second glass sheet having a thickness of 1mm are introduced into a production line for assembling the laminated glazing.
Blanks of the first and second glass sheets are cut into their final shapes and fed into a washer.
The ClimaCoat stacks were rimmed, i.e. the thin peripheral strips were removed therefrom by abrasion with metal brushes, so that the limit of the stacks was completely within the surface of the black peripheral enamel strips.
Busbars made of silver were formed by screen printing on a ClimaCoat stack and then dried, in contact with two opposite peripheral portions of the stack surface, also lying completely opposite the surface of the peripheral strips of black enamel.
Two glass sheets were paired and subjected to heat bending.
A second glass sheet having a thickness of 1mm was subjected to chemical stiffening.
The laminated glazing is assembled using a layer of polyvinyl butyral (PVB) having a thickness of 0.76mm, by using different possible and known combinations of thermal cycle-temperature profile devices, addition and/or decompression devices. Laminated glazings provide excellent desired anti-icing and anti-sunburn functions; its aesthetic appearance meets the current requirements.
Claims (8)
1. Method for manufacturing a laminated glazing comprising a first glass sheet and a second glass sheet bonded to each other by an interlayer adhesive layer, wherein the laminated glazing is curved, the face of the first glass sheet facing the second glass sheet comprising a peripheral opaque enamel band and a functional layer of a de-rimmed portion, the edge of the functional layer of the de-rimmed portion covering the peripheral enamel band while lying completely in the surface of the latter, and the first glass sheet having a thickness at least equal to 1.4mm and the second glass sheet having a thickness strictly less than 1.4mm, characterized in that it comprises the operations consisting in:
-depositing, by screen printing, one or more opaque enamel strips on a first glass sheet having dimensions at least equal to those of the blank and at most equal to those of 6m x 3.21m, according to a geometry defining at least part of the periphery of said one or more laminated glazings;
-pre-curing the first glass sheet at a temperature of 500 to 600 ℃ to completely remove the organic binder and pre-cure the opaque enamel;
-depositing a functional layer on a first glass sheet;
-cutting the first glass sheet into blanks, if necessary, at the latest at this moment;
-introducing blanks of first and second glass sheets into a production line for assembling the laminated glazing;
-cutting blanks of first and second glass sheets into their final shape and feeding them into a washing machine;
-removing the edge portion from the functional layer if no masking is performed where it is desired to avoid the presence of the layer during deposition of the functional layer;
-forming busbars on the latter by screen printing and then drying;
-pairing a first glass sheet and a second glass sheet and bending them by heating;
-assembling the laminated glazing by means of an interlayer adhesive layer,
or in that it comprises the operations consisting in:
-depositing, by screen printing, one or more opaque enamel strips on a first glass sheet having dimensions at least equal to those of the blank and at most equal to those of 6m x 3.21m, according to a geometry defining at least part of the periphery of said one or more laminated glazings, then drying;
-forming busbars on a first glass sheet by screen printing and then drying;
-pre-curing the first glass sheet at a temperature of 500 to 600 ℃ to completely remove the organic binder and pre-cure the opaque enamel and the busbars;
-cutting the first glass sheet into blanks, if necessary, at the latest at this moment;
-introducing blanks of first and second glass sheets into a production line for assembling the laminated glazing;
-cutting blanks of first and second glass sheets into their final shape and feeding them into a washing machine;
-depositing a functional layer over the busbars on a first glass sheet;
-removing the edge portion from the functional layer if no masking is performed where it is desired to avoid the presence of the layer during deposition of the functional layer;
-pairing a first glass sheet and a second glass sheet and bending them by heating;
-assembling the laminated glazing by an interlayer adhesive layer.
2. The method of claim 1, wherein the first glass sheet is not stiffened.
3. The method of any one of claims 1 and 2, wherein the second glass sheet has a thickness of at most equal to 1.1 mm.
4. The method of claim 3, wherein the second glass sheet is chemically stiffened.
5. A method as claimed in either of claims 1 and 2, wherein the second sheet of glass is subjected to chemical stiffening between the heating to bend the two sheets of glass and assembling them into a laminated glazing.
6. Method according to any one of claims 1 and 2, characterized in that just before pairing the first and second glass sheets and bending them with heat, a second opaque enamel band is deposited on the busbars or functional layers according to a geometry which defines at least part of the perimeter of the laminated glazing, which is allowed to dry and pre-cured at a temperature between 500 ℃ and 600 ℃.
7. Use of a laminated glazing obtained by the method of any one of claims 1 to 6 for vehicles for ground, air or water transportation, buildings, interior furnishings or street furniture.
8. Use according to claim 7 as a windshield for a motor vehicle.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1654900 | 2016-05-31 | ||
| FR1654900A FR3051716B1 (en) | 2016-05-31 | 2016-05-31 | LAMINATED GLAZING WITH A FUNCTIONAL LAYER DEMARGED |
| PCT/FR2017/051344 WO2017207914A1 (en) | 2016-05-31 | 2017-05-30 | Laminated glazing with a borderless functional layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109153233A CN109153233A (en) | 2019-01-04 |
| CN109153233B true CN109153233B (en) | 2021-11-09 |
Family
ID=56896698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780033702.1A Active CN109153233B (en) | 2016-05-31 | 2017-05-30 | Laminated glazing with a functional layer having a removed edge portion |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP3463870A1 (en) |
| KR (2) | KR102433607B1 (en) |
| CN (1) | CN109153233B (en) |
| FR (1) | FR3051716B1 (en) |
| MX (1) | MX2018014701A (en) |
| WO (1) | WO2017207914A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3077761B1 (en) * | 2018-02-14 | 2020-02-21 | Saint-Gobain Glass France | AUTOMOTIVE WINDSHIELD WITH A CAMERA FIELD ZONE WITH REDUCED OPTICAL DISTORTION |
| FR3093105B1 (en) * | 2019-02-22 | 2021-02-26 | Saint Gobain | Glass sheet coated with a layer of mineral paint and a stack of thin layers |
| FR3100244B1 (en) * | 2019-09-04 | 2023-10-27 | Saint Gobain | Glass sheet comprising an enameled area and an undercoat |
| WO2021105241A1 (en) * | 2019-11-29 | 2021-06-03 | Agc Glass Europe | Laminated glazing for projecting an image from a head-up display (hud) |
| CN111470781B (en) * | 2020-03-06 | 2023-01-13 | 信义节能玻璃（四川）有限公司 | Glass processing method and glass processing equipment |
| CN114258345A (en) | 2020-06-18 | 2022-03-29 | 法国圣戈班玻璃厂 | Method of manufacturing a curved coated vehicle glass sheet with an opaque cover coating and a clear coating |
| FR3114265B1 (en) * | 2020-09-21 | 2023-03-24 | Saint Gobain | Process for obtaining laminated curved glazing |
| FR3116021B1 (en) * | 2020-11-12 | 2023-12-29 | Saint Gobain | Laminated glazing for vehicles, particularly automobiles |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004082934A1 (en) * | 2003-03-21 | 2004-09-30 | Pilkington Italia S.P.A. | Laminated vehicular glazing |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE68917549T2 (en) * | 1988-09-01 | 1995-03-16 | Asahi Glass Co Ltd | Glass for automotive glass. |
| DE3912512A1 (en) * | 1989-04-17 | 1990-10-18 | Ver Glaswerke Gmbh | ELECTRICALLY HEATED CAR GLASS DISC |
| DE3937346A1 (en) * | 1989-11-09 | 1991-05-16 | Ver Glaswerke Gmbh | ELECTRICALLY HEATED CAR GLASS PANEL MADE OF COMPOSITE GLASS |
| DE4132652C2 (en) * | 1991-10-01 | 1995-04-27 | Flachglas Ag | Process for producing a single-curved or a double-curved laminated glass pane, in particular for motor vehicles |
| KR970009549B1 (en) * | 1994-10-26 | 1997-06-14 | Daewoo Telecom Co Ltd | Telephone power detector |
| US7125462B2 (en) * | 2002-06-18 | 2006-10-24 | Centre Luxembourgeois De Recherches Pour Le Verre Et Al Ceramique S.A. (C.R.V.C.) | Method of making vehicle windshield using coating mask |
| FR2936510B1 (en) | 2008-09-30 | 2019-08-30 | Saint-Gobain Glass France | SUBSTRATE PROVIDED WITH A STACK WITH THERMAL PROPERTIES, ESPECIALLY FOR REALIZING A HEATED GLAZING. |
| EP2977202A1 (en) * | 2014-07-25 | 2016-01-27 | AGC Glass Europe | Heating glass |
-
2016
- 2016-05-31 FR FR1654900A patent/FR3051716B1/en active Active
-
2017
- 2017-05-30 KR KR1020227003950A patent/KR102433607B1/en active Active
- 2017-05-30 WO PCT/FR2017/051344 patent/WO2017207914A1/en unknown
- 2017-05-30 KR KR1020187034331A patent/KR20190012170A/en not_active Ceased
- 2017-05-30 EP EP17732515.6A patent/EP3463870A1/en not_active Withdrawn
- 2017-05-30 CN CN201780033702.1A patent/CN109153233B/en active Active
- 2017-05-30 MX MX2018014701A patent/MX2018014701A/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004082934A1 (en) * | 2003-03-21 | 2004-09-30 | Pilkington Italia S.P.A. | Laminated vehicular glazing |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017207914A1 (en) | 2017-12-07 |
| KR20190012170A (en) | 2019-02-08 |
| KR20220025117A (en) | 2022-03-03 |
| FR3051716A1 (en) | 2017-12-01 |
| FR3051716B1 (en) | 2020-09-25 |
| CN109153233A (en) | 2019-01-04 |
| KR102433607B1 (en) | 2022-08-18 |
| EP3463870A1 (en) | 2019-04-10 |
| MX2018014701A (en) | 2019-03-11 |
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